In Windows 10 PC, you have C: drive which contains all program files, in addition, it also has all your saved word documents, photos, and your important files. If your operating system becomes corrupted in case of the worst scenario, then all your important files will get lost.
To avoid such data loss and to keep your most important files separate, we will go for a separate space from your C: drive using a partition. By doing this, even if your operating system gets corrupt, we will likely be able to get all your important files safely.
It is always safer and best practice to put your personal files or important files on a different partition.
This blog post demonstrates how easily we can partition the C: drive using a built-in disk manager in windows 10.